synthesis, the spectroscopic, and the thermal characterization of linear and crosslinked polymers as well as a number of corresponding model compounds, containing Diels–Alder adducts derived from furan and maleimide groups. The thermal reversibility (rDA, DA) of structurally varied model compounds, polymeric and network structures were studied by differential scanning calorimetry, where possible in combination
这项研究描述了线性和交联聚合物以及许多相应的模型化合物的合成,光谱和热表征,其中包含衍生自
呋喃和马来
酰亚胺基团的Diels-Alder加合物。通过差示扫描量热法研究了结构变化的模型化合物,聚合物和网络结构的热可逆性(r
DA,
DA),并可能与1 H NMR光谱法结合使用。它成立的内切和外切
DA立体显示显著不同的热反应:的R
DA内
DA加合物通常发生在20-40 K下部的温度比相应的外除某些芳族马来
酰亚胺外,在任何情况下
DA-加合物。尽管仅在某些情况下在有限的程度上观察到了原位异构化,但预计该作用不会影响
DA交联网络的热可再生性,而
DA交联网络取决于两个单独的立体异构体r
DA步骤。©2010 Wiley Periodicals,Inc. J Polym Sci A部分:Polym Chem 48:3456–3467,2010